host-transport: pldm: fix variable shadow

Inside a single function are two variables both named 'eid' but
of different types.  This causes confusion to clang and implicit
constructors are inadvertently called.  Eliminate the variable shadow.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I2c15799718b0129aad01ab857dec7a255cbf36a3